Cinematographic apparatus



Feb 12 1924. 1,483,105 I G. MlCHETTl GINEMATOGRAPHIC APPARATUS Filed Oct. 5, 1921 5 2 j a" .12- I 5 If v J I 5 6 v I v 6 f Patented Feb. 1 2, 1924.

PATENT OFFICE.

GIORGIO MICHETTI, F ROME, ITALY.

CINEMATOGRAI'HIC APPARATUS.

Application filed October 3, 1921.

To all whom it may concern:

Be it known that I, GIORGIO MJOHETTI, subject of the King of Italy, residing at 3 Lungotevere Castello,.Rome, Italy, have invented a new and useful Improvement in Ginematographic Apparatus; and I do hereby declare the followin to be a full, clear, and exact description of the same.

The invention relatesto cinematographic apparatus and it has for its object to construct an apparatus of this type wherein the film is lodged inside the apparatus and the gearings are of such simple construction as to allow of the apparatus being reduced to a minimum size or of pocket formation.

The invention is illustrated b way of example in the accompanying rawmgs, in which Figural is a front view of the apparatus with the coverf removed,

' Figurefl shows the interior thereof and Figures-3, 4 and fi are details of the apparatus; The film travels round a toothed and aper- 25 tured drum 1. The intermittent rotary motion of the drum -is obtained by aid of a crankhandle 2'iand a gear wheel 3 through the intermediaryv of a gear wheel 4 and an 'escapem'ent of the anchor type as usually employed 'i'nfclocks. The gear wheel 3 engages a pinion on ashaft 5 for winding the fihnonto a spool and also with a pinion on a spindle 6 which has mounted on it a @sma'll veccentric 7 (Fig. 5) which causes a 'balancevwheel S to oscillate so that teeth 9, 9 provided thereon strike alternately against teeth 10, 10' provided on an enlarged -boss 11 (Figs. 3 and 4) at one end'of the ,drnm 1, thereby arresting" the rotation of the drum for the required period of time at each exposure. "Ihe'gear 4 is mounted loose on the drum (Fig. 3) and is connected therewith through which engages a bevel gear 14 mounted on mitted,'for example through a belt 17, to the "shutter 16 of the apparatus.

the only, intermediary of a spiral springlz is obtained Serial No. 504,983.

during each revolution of the gear wheel 3,

while the drum during this time completes one and a half revolutions, and eachrevolution of the crank handle therefore produces six exposures.

When turning the handle 2, the gear 3 produces a continuous motion of the various parts of the apparatus with the sole exception ofthe drum 1. This drum turns only during those intervals of time during which the eccentric 7 which alternately raises and lowers the balance wheel 8, disengages one of the teeth 10 of the boss 11 from the tooth 9 by which it was held up, so that the boss and the drum are able to complete a quarter revolution under the action of the gear 4 and -0f the spring 12. At the end of this rotation another tooth 10 will arrest the boss 11 by coming into contact with the second tooth 9 of the balance Wheel.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In a cinematographic apparatus, a feed drum, actuating mechanism for the drum, a boss fixed to the drum, and a ring shaped balance member, cooperating with the boss, for regulating motion of the drum.

2. In a cinematographic apparatus according to claim 1, said balance member completely encircling said boss, and being pivoted at its periphery for oscillation, cooperating teeth onthe boss and the balance member, and means positioned at the periphery of the balance member, for oscillat- 'ing the member, whereby to afford a compactmechanism adapted for miniature apparatus.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

GIORGIO MICHETTI.

Witnesses TORELTO FONTACY, MAURY. LARKIN. 

